Which reserve is the best to photograph kingfishers?

Hi, I am determined to photograph kingfishers this year without falling foul of protection laws. On this basis I wondered which RSPB resort I am more likely to realise this ambition? and best time of year.

Although I am located in Hampshire, I am willing to travel. A reserve with a kingfisher hide would be ideal, but allows me to shoot fairly close. Any help/advice much appreciated.